Asus P5B-Plus, one RAID5 array.
After updating IRST to 220.127.116.110 there's no option to enable write-back cache. I do remember it was there before. Any ideas? Thanks!
I figured it out. The reason was that "Turn off Windows write-cache buffer flushing on the device" option on Policies tab in my RAID volume properties (Disk Management snap-in) was disabled.
Retrieving data ...